Lamp-socket.



H. J. MOREY a F. A. BROGDEN.

LAMP SOCKET. APPLICATION FILED JULY 9, 1909.

Patented Nov. v, 1911.

l insulatingr titi fltrijlliilbl PATENT OFFICE.y

HRRY J. MOREY 'AND PAY A. BROGDEN, OF SYRACUSE, NEW YORK.

LAMP-SOCKET'.

Specilcation of Letters Patent. i .application filed July 9,1909.

Patented Nov. '7, 1911. serial No. 506,931.

simple in construction and easily assembled.

The invention 4trent-ially stated consists in a base provided with switch contacts connected in series with a circuit, in this case with lamp contacts, a movable contact plate adapted to bridge the switch contacts. and a ratchet member adai'ited to move the platte to bridge the contacts and close the circuit and move ity to a position to open the circuit.

The .ratchet member is operatively coiiiiected with a cord which niovcs it in one direction, and a spring is connected with the ratchet, to move it in the opposite direction. This spring is a torsion spring which surrounds the pivot pin tor the contact plate and the movable ratchet member, and performs the double function of moving;l the ratchet member in one vdirection and main-v taining` the contact plate operatively in cngageinent with the switch contacts. This springr is arranged sc tliat its tension may be adjusted without necessitating the disassembling` of the socket. The socket. comprises spaced insulatingblocks connected by standards. The cord `.guide'is attached to one ot these stai'idards by soldering or formed integral therewith in any suitable manner. By coi'isti'ucting the guide in this manner the shell and cap` inclosing the .socket may be ot' the ordii'iary construction.

l'ii the drawings: Figure 1 is an elevation ot the lamp socket. showing;1 the shell and cap iii section; Fig. 2 is a view ot one ofthe insulating;y blocks; VFig'. is a View 'pf the other insulating' bloeit; Fig. #t is a www ojlt the tuoi/able ratchet member; litigi'. .i is a` perspective vier: ot the movable contact plate; and Fig, (i is a. sectional View ot the soci-nt: alongY thc lino t`A t3 olf llio'. El.

ilc'icii'iiip to the drawings, l0 designates? the upper insulating' block and 'l1 the lower block, these bloc-lc.; being coniiected by standards 131 14 and .15. ,The

standards 18 and 14 are provided with the usual binding screws forming the terminals ot' the lamp, and standard 13 isconnected to. the socket B which forms one of the lamp contacts by means ot the screw 13. The ing sulating block 11 is provided with inclins i 16, 17, 18- and 19 forming teeth. "These iiiclines are preferably segmentalin form and formed integral with the blockl'l. The 155 inclines 18 and 19 are provided withmetallic facings secured thereto in any suitable manner, preferably by small pins or screws as shown. The plate on the tace 19 is electrically connected with the standard 1411s l shown in Figs. 3 and 6, and the contact face on the incline 18 has a downwardly extending portion 20 terminating in the second lamp contact 21.

A metallic'contact plate 25 provided withi'' radial arms 26 is provided with a hole 27 and rotatably mounted upon thev pivot =pin 28, which pivot pin is mounted in the inf sulating; blocks 10 and 11. j Pivotallymoiinted upon the pin 28 is an operating member, '3p

preferably of insulating material, provided with ratchet teeth 30. A torsion vspring 31 coiled on the pin 28 is connected at one end to the ratchet member 29 and at its-other end to the T-shaped head The headris provided with a slot 32 sof that it may be engaged by a` screw-driver inserted through the hole 34 formed in theupper insulating block. This block is also provided 33 of the piti-8 with locking recesses 35 for engaging 118,190

arms of the" -sliaped head 33 and maintainpin downwardly until the head 33 is outrof 15 f engagement with the recesses 35. 'The'fp'ln may then be rotated until the desired'tension has been obtained, and when released, the head 88 will engage the locking` recesses 35 and hold the pin against rotative y The ratchet member 29is prov, 'ed withi-'a ling it in position. The tension of the spring inventent.4 i0@ segmental portion 3G provide fI/with a-cir" cumterential groove A notched pill4 38 .is located in this groove and ist adaptedto engage the balls on the pull cord or chain 39. This chain passes through a laringguide 40.` scoured to the standard 15 in any suitablev manner and is ,preferably formed integral therewith. [The inclines 16, 17, 18 and 19 are formed on an annular boss, and the inv open. Bypulling the cord 39 downwardly the..ratchet member 29 is moved so that its i teeth 30 engage the arms of the contact plate and move it onefourth of a revolution until. it snaps.- Iover the inclines 16 and 17 and drops into engagement with the switch conl tact faces upon theinclines v18 and 19, a firm contact being made due to the action of the spring 31 which, acting through the ratchet member 29, movesthe'contact plate 25 into ,i engagement with the switch contacts. The l contact plate will thus bridge the switch contacts and the circuit will` be closed. When the cord v39 is released the spring 31 will move the ratchet member-back yso that another set of teeth engage the arms 26. A second pull upon the cord 39 will open the circuit. It will be noted. that the circuit is closed bybridging the switchA contacts on the inclines 18 and. 19 by means of a single contactl plate 2,5. This construction has a Y decided advantage over those constructions in which the contact is made through the lamp socket.

pivot pin, dueto the'fact that in the latter construction the contact betweeny the pivot pin and the contact plate is more or less loose. In this construction, however, the current passes directly through ,thecontact plate, and the spring 81 maintains this conh tact plate' in firm engagement with the switch contacts.` By securing the guide 40 to the standard 15 and by forming it integral therewith a rigid structure and bearing for the.guide is obtained. This construction hasa decided advantage over those constructions in which the guide is formed upon the shell. In the latter construction the guide is liable to break ot'when any strain is pt upon it. In the yconstruction shown in the drawing the shell and cap may be of the usual construction.

-Vlhile vthis invention is shown as'applied' switch, and it is'therefore to be understood that this invention is nottoI be limited to a Itis obvious that various changes may be made in the details of' construction without departing from this invention, and it is therefore to be understood thatthis invention is' not to be limited to the specific conf structions shown.

What we claim is: 1. In a lamp socket, the combination with an insulating blockia'nd a pivot thereon, of a with an insulating block, of'a set of oppositely ldisposed switch contacts mounted thereon, a movable contact plate having arms and adapted to bridge the switch contacts, a pivot pin for the contact plate, ano a ratchet member mounted on the pivot pin and having teeth engaging the arms of the contact plate to operate the same. I

3. In an electrical switch, in combination, an insulating block provided with pairs o. inclines, thealternate inclines having switch contact faces, a movable contact plate adapted to bridge and be -moved out of engagement with both of the switch contact faces said plate engaging said contact faces di# rectly, and a ratchet member for operating the contact plate.

4. In a lamp socket, the combination with lamp contacts, of a terminal attached to one lamp contact, an insulating block providet with pairs of inclines, the alternate inclincs having switch contact faces, and onel of the.

contact faces being connected to the other lamp contact, a terminal connected to the other contact face, a contact plate bridging the contact faces, and a-ratchet member having a tooth engaging the contactv plate.

5. In a lamp socket, the combination with an insulating block, of lamp contacts mounted thereon, said block being provided with pairs of inclines, the alternate inclines having switch ,contact faces in series with the lamp contacts, a contact plate bridging the contact fa es, and an operating ratchet membelar havin, a tooth engaging the contac p ate.

6. In a lamp socket, the. combination with an insulating block, of lamp contactsan terminals and a- 'set of switch contacts mounted thereon, one of the switch contactsl being connected to one terminal and the other to one of the lamp contacts, a movable contact plate adapted to bridge the switch contacts, and a ratchetmember for operating the contact plate` In an electrical switch, 1n combination, an insulating block provided with pairs of inclines, the alternate inclines having switch contact faces, a movable contactplate adapt ed. to bridge the switch contact faces, L ratchet member having teeth engaging the contact plate to operate the same, theI inclines on the block and the teeth on the yum ratchet member being on circles of different lon the ratchet member being located inside io diameters, for the purpose set forth. of the inclines, for the purpose set forth.

8. In an electrical switch, in combination, In testimony whereof We aiX our` signa` an insulating block provided with pairs of tures in presence of two Witnesses.

inclines, the alternate inclines having switch HARRY J. MOREY. Contact faces, a movable contact plate adapt- FAY A. BROGDEN.

ed to bridge the switch contact faces, a Witnesses: ratchet member having' teeth engaging the JNO. B. TUCK, contact plate to operate the same, the teeth LEONARD C. CROUCH. 

